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====== Accurate Sailing Sensors ======

====Speed-Leeway====
[[https://www.airmar.com/productdescription.html?id=199|Airmar DX900+ Multilog Smart™ Electromagnetic Speed/Leeway/Depth/Temp Sensor Nmea2000 Thru‑hull]]  True leeway instantaneous

  * [[http://davidburchnavigation.blogspot.com/2018/04/effect-of-leeway-on-knotmeter-speed.html|Effect of leeway on Knotmeter speed]]
  * [[https://www.practical-sailor.com/marine-electronics/cracking-the-leeway-code|Cracking the Leeway Code]] 
  * [[https://www.starpath.com/resources2/Navigation_with_Leeway.pdf|Navigation with Leeway]]
  * [[http://brickhouseinnovations.com/|Electromagnetic Foreward & Leeway Sensor]]
  * [[https://www.zoominfo.com/c/brickhouse-innovations/388443080|Zoominfo Brickhouse Innovations]]
  * [[https://patents.google.com/patent/US20160377646|Electromagnetic boat speedometer having removable electrodes]]
  * [[https://uspto.report/patent/grant/10,416,187|Brickhouse Patent]]
  * [[https://patents.justia.com/assignee/brickhouse-innovations-llc|Patents Assigned to BRICKHOUSE INNOVATIONS, LLC]]

==== Apparent Wind, Pitch and Roll ====
  * [[https://www.airmar.com/weather-description.html?id=153|Airmar 220WX WeatherStation]]

===Airmar 220WX Apparent & True Wind WeatherStation ===
  * Power: 9-40 Volt DC, IPX6 Waterproof Rating
  * Output via a single cable for power either RS422 (NMEA 0183) or CAN BUS (NMEA 2000) data interface (optional RS232 NMEA 0183)
  * Includes 3-Axis Solid State Compass with Dynamic Stabilization
  * Outputs both NMEA 0183 and NMEA 2000 (Cables Sold Separately)
  * True wind speed and direction
  * 10Hz GPS (COG/SOG/Position) 
  * Three-axis solid state compass with dynamic stabilization
     * Better than 1 degree static compass accuracy, with yaw rate gyro, which can maintain 2° of heading accuracy in dynamic heeling conditions
     * Compass readings are very accurate which result in accurate true wind readings when a sailboat is heeled
     * Best-in-class 2 degree dynamic compass accuracy
     * Three-axis rate gyros provide rate-of-turn data Best-in-class pitch and roll accuracy
     * Three-axis accelerometer for pitch and roll 
  * Barometric pressure
  * Air temperature & Wind chill temperature
  * Measures wind speed and direction ultrasonically
  * Access to WeatherCaster Software included,  WeatherCaster PC software for viewing and customizing data sentences 
  * NMEA 2000 LEN=13
  * Power supply featuring a 50% reduction in current draw for use in remote locations that use solar or battery power
  * Adjustable, unfiltered wind data for monitoring maximum gust conditions
  * Optional  Removable humidity sensor that is field serviceable (units with the relative humidity module are IPX4 waterproof rated)

  * [[https://panbo.com/sailing-with-an-airmar-pb200-/|Sailing with an Airmar PB200 UltraSonic Sensor on the Mast]] Apparent Wind plus Pitch and Roll
  * [[https://panbo.com/sailing-with-an-airmar-pb200---part-ii-/|Sailing with an Airmar PB200 – Part II]]
  * 